By Present perfect, Perfect progressive

>We told Sharon that her comments didn't really relate to the key issues at hand. is correct. I think, the direct speech sentence is in simple present: "Your comments don't relate to the key issues." When the "introduction"part of a sentence in indirect speech is in a past tense form (here:...

You certainly meant which tense is used in each sentence?! 1. lives -> Simple Present ---> for generally known facts, truths; habits 2. is studying -> Present Progressive ---> expresses actions that happen just right now in this moment 3. lived -> Simple Past ---> for any action that happened...

I don't want to make them passive, I just wanted to know if there really is no passive form for those Perfect Progressive tenses while every other tense has a passive voice though. E.g. Present: "Tom writes a letter" --> "A letter is written by Tom" Present Progressive: "Tom is writing a letter"...

As far as I know, there are these 13 tenses: a) Past Perfect Progressive ........................had been + present participle b) Past Perfect ..........................................had + past participle c) Past Progressive ...................................was/were + present participle d)...

What are the differences between the present pefect simple and the present perfect progressive?